8. No solutions9. No, (-2,3) is not the solution of the system as it doesn't satisfy the 2nd equation (x= y-4)substituting the value of x=-2 and y=3 we will get,-2 = 3-4, that is -2=-1 which is not true.10. Yes, (-2,3) is a solution of the given system, since it satisfies both the equations.substituting value of x=-2 and y=3 we will get,-2+3=1, that is 1=1, which is true
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